71005423 has 2 divisors, whose sum is σ = 71005424. Its totient is φ = 71005422.

The previous prime is 71005411. The next prime is 71005433. The reversal of 71005423 is 32450017.

It is a strong prime.

It is an emirp because it is prime and its reverse (32450017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71005423 - 2²¹ = 68908271 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71005394 and 71005403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71005433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35502711 + 35502712.

It is an arithmetic number, because the mean of its divisors is an integer number (35502712).

Almost surely, 2^71005423 is an apocalyptic number.

71005423 is a deficient number, since it is larger than the sum of its proper divisors (1).

71005423 is an equidigital number, since it uses as much as digits as its factorization.

71005423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 71005423 is about 8426.4715628785. The cubic root of 71005423 is about 414.0923172348.

The spelling of 71005423 in words is "seventy-one million, five thousand, four hundred twenty-three".